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Comparison of LASIK Method:
Z-LASIK Vs ReLEx® SMILE

The comparison of LASIK method between Z-LASIK and ReLEx SMILE will be discussed in this article. LASIK itself stands for Laser Assisted In Situ Keratomileusis, is a corrective surgery in which a thin layer of the cornea is opened to allow laser light to change the shape of the cornea to eliminate refractive abnormalities (myopia and astigmatism). The LASIK method evolved from the 1960s to the present.

LASIK Method Comparison

7 Dimension Z-LASIK (7D Z-Lasik): Comparison of the LASIK Method

7D Z-LASIK merupakan salah satu metode LASIK yang menggunakan sistem Latency-Free Tracking sehingga mampu melacak 7 dimensi pergeseran bola mata saat proses operasi dilakukan. Metode ini menggunakan inovasi sistem excimer laser berkecepatan tinggi dengan 1050Hz dan dirangkaikan dengan mesin Ziemer Crystaline 5000 Khz atau yang biasa disebut dengan Femtosecond laser. Metode ini dibuat dengan tujuan untuk mengikuti pergerakan bola mata normal. Oleh karena itu, sistem pelacak Latency-Free Tracking berkemampuan untuk menembakkan excimer laser tanpa ada jeda waktu.

Selain itu 7D Z-LASIK dilakukan sebagai prosedur bebas pisau dengan menggunakan pengukuran komputer dan laser berteknologi tinggi untuk mengoreksi penglihatan yang terjadi pada mata seperti myopia dan astigmat.

Prosedur Z-LASIK

1. Laser femtosecond digunakan untuk membuat lipatan (flap) yang sangat tipis sekitar 10mm melalui jutaan bintik laser kecil yang ditembakkan ke permukaan kornea. Dengan menggunakan teknologi laser, keseluruhan prosedur tidak menggunakan pisau bedah. Ketika lapisan flap pada kornea telah selesai, flap dibuka secara halus, dan mata siap untuk dilakukan langkah kedua.

2. Selanjutnya, koreksi myopia dan astigmat dilakukan dengan menggunakan excimer laser selama beberapa detik. Setelah itu, flap ditutup kembali dan akan melekat dengan sendirinya.

Kelebihan Z-LASIK

  • Prosedur yang tidak terlalu invasif
  • Dapat menghilangkan ketergantungan pada kacamata atau softlens
  • Keseluruhan proses hanya membutuhkan waktu selama beberapa menit

ReLEx® SMILE: Comparison of the LASIK Method

ReLEx® SMILE is the latest lasik method that uses a procedure without flap and minimally invasive. Unlike other LASIK methods, using the ReLEx SMILE technique, the eye correction process from start to finish uses the same laser that is the VisuMax Femtosecond Laser. SMILE itself stands for Small Incision Lenticule Extraction which is the latest development in Laser Surgery which was pioneered by a team of Expert surgeons at Carl Zeiss Meditec.

By using only one machine: VisuMax will make operating times faster and patients feel more comfortable.

ReLEx SMILE Procedure

1. Visumax Femtosecond Laser makes thin corneal tissue shaped like a lens (lenticule) at the base of the inner layer of the cornea and then formed a 2- 4mm corneal incision.
2. Furthermore, the lenticule is removed through the corneal incision, so that the structure of the cornea is maintained and stable due to the absence of flap making. The small incision in the cornea will heal naturally. Intake of the lenticule changes the way light enters the eye, so that the eye can see clearly without the aid of glasses or contact lenses.

Benefits of ReLEx SMILE

  • There are no complications related to flaps; such as a flap shifted or wrinkled due to the absence of flap making in this operation process.
  • Do not use a scalpel at all and only use Visumax Femtosecond Laser so that the healing process and phase take place faster.
  • The procedure is minimally invasive because this method only has a 4mm incision.
  • It only takes a few minutes in the operation process.
  • Due to the absence of openings (flaps), the patient feels more comfortable and does not experience pain.
  • Complaints of dry eyes after surgery are greatly reduced because there is no action on the structure of the upper cornea.
  • ReLEx® SMILE reduce optical abrasion that occurs because there is no flap.
  • Can eliminate dependence on glasses or contact lenses.

Which is the Best Between the Two: Comparison of the LASIK Method

LASIK 7-D Z in the process uses two machines, namely excimer laser and femtosecond laser, it performs a flap opening of about 10 mm in the cornea of ​​the eye and does not use a scalpel at all.

Compared to ReLEx SMILE , this method is a technology The latest LASIK which is only 4mm incision in process (smaller than other LASIK methods) using a laser (not using a scalpel), and using only one tool, the sophisticated Visumax Femtosecond Laser, thus making the operation process a faster. In addition, in the absence of flap opening, the patient will feel more comfortable and maintain the corneal structure of the eye.

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ReLEx® SMILE Vs Conventional LASIK: Advantages and Prices

References:
Gershoni, Assaf & Mimouni, Michael & Livny, Eitan & Bahar, Irit. (2018). Z-LASIK and Trans-PRK for correction of high-grade myopia: safety, efficacy, predictability and clinical outcomes. International Ophthalmology. 10.1007/s10792-018-0868-4. Available at: https://www.researchgate.net/publication/323718443_Z-LASIK_and_Trans-PRK_for_correction_of_high-grade_myopia_safety_efficacy_predictability_and_clinical_outcomes
Miruna, N., Andrei, F., Vasile, F. M., & Rotaru, E. (2016). Smile–the next generation of laser vision correction. Romanian journal of ophthalmology, 60(1), 6–8. Available at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5712922/